Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 264
ers on the market, mostof them differing in shape only,and all combining the essentialfeatures of permanent magnets,bearing coils on their poles anda thin iron diaphragm destinedto transform into sound-wavesthe impulses brought in currentform along the line from thetransmitter. The transmitter 2n.… … Fig. 115. 262 MODERN ELECTRICITY Berliner, Hunning, Edison and Blake, have designed trans-mitters based on the theory of varying pressure, whichtransmit electrical impulses more effectively. Fig. 115 showsa section of the Blake transmitter. In this instrument the diaphragm a, surrounded by arubber…
Electrical engineering
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